I want to start using Zimbra in our company. However there is currently one thing I can't get to work...When I want to add an external calendar of type CalDAV, the UI forces me to enter an email-address as the username. We have a meeting calendar (in Redmine) where the login is only possible with the username (not with an email-address).Is there any way we can get around that limitation?

Hi i have the same problem. When the caldav settings for the external calendar on my android phone they work just fine. Dont know why this has not been fixed yet. Did you manage to find a solution to this issue?